A sealed connection assembly for an industrial air conditioning liquid cooling system

Abstract

The present application belongs to the technical field of sealing connection of liquid cooling pipeline, and particularly relates to a sealing connection assembly of an industrial air conditioner liquid cooling system, which comprises a male head and a female head, the male head is integrally formed with a connecting pipe, the connecting pipe is embedded with a sealing ring I, the female head is integrally formed with a sleeve, a sealing plate is slidably arranged inside the sleeve, the bottom of the sealing plate is embedded with a sealing ring II, the sealing ring II is provided with a conical boss, and the sealing ring I is provided with a conical groove matched with the conical boss. The sleeve is assembled with a shaft, a limiting sleeve with a spiral groove, a ball and a guide rail structure. The present application adopts a composite structure of conical concave-convex alignment sealing, slot filling sealing, ball spiral self-adaptive compensation and torsion synergistic sealing, effectively solves the technical defects of high pressure leakage, no wear compensation, poor anti-shock and anti-looseness performance and high operation and maintenance cost of the existing liquid cooling sealing joint. The present application has compact structure, simple assembly, good sealing performance and long service life, and can be widely applied to the sealing connection of high pressure liquid cooling pipeline of industrial air conditioner.

Description

Technical Field

[0001] This invention belongs to the field of liquid cooling pipeline sealing connection technology, and specifically relates to a sealing connection component for an industrial air conditioning liquid cooling system. Background Technology

[0002] Industrial air conditioning liquid cooling systems rely on the circulation of ethylene glycol and deionized coolant to dissipate heat from high-power components. Sealing connection components, as the core parts for segmented pipe connections, directly determine the leak-proof capability, vibration resistance, and total lifecycle maintenance cost of the liquid cooling system under high-pressure conditions (0.3–1.5 MPa). They are widely used in piping connections for large air-cooled chillers, variable frequency industrial central air conditioning systems, and cabinet-type liquid cooling units. Currently, industrial air conditioning liquid cooling pipes mostly use threaded butt-joint sealing joints, relying on single / double-layer O-ring compression to achieve end-face sealing. However, due to system start-up and shutdown pressure fluctuations, continuous vibration during unit operation, coolant corrosion, and thermal cycling deformation, conventional sealing joints commonly suffer from high-pressure leakage, rapid seal failure after O-ring wear, the need for complete joint replacement after aging, and leakage due to vibration loosening. Long-term operation can easily lead to coolant loss, unit short-circuit corrosion, and significantly increase equipment maintenance costs.

[0003] Currently, several patents related to liquid cooling pipeline sealing joints have been published in the industry. Among them, the patent with announcement number CN110469731B is a quick-change joint with dual sealing function. This patent discloses the threaded assembly structure of the male and female joints. Three independent O-rings are set inside the joint to form a multi-layer sealing protection. Static sealing is achieved by pressing the sealing rings with the flange end face. After a single sealing ring is damaged, the remaining sealing rings can be used to temporarily prevent leakage. However, this patented sealing structure is a planar pressure seal, relying solely on the thread preload to fix the compression of the sealing ring, which has the following drawbacks: First, it lacks a precise limiting structure with conical concave-convex alignment, making the sealing ring prone to radial displacement and uneven local pressure when the thread is tightened, allowing high-pressure coolant to leak from the eccentric gaps in the sealing ring; Second, it lacks a follow-up compensation clamping mechanism, causing the compression of the sealing ring to continuously decrease after long-term wear, making it impossible to automatically compensate for the sealing margin, and leakage will occur even with slight corrosion and aging of the sealing ring, requiring the entire connector assembly to be disassembled and replaced, resulting in high replacement costs; Third, it lacks an anti-torsion and anti-vibration structure, and the vibration during the start-up and shutdown of the industrial air conditioner will gradually loosen the threads, causing the sealing ring to fatigue and fail rapidly due to repeated alternating compression from vibration, making it unsuitable for the long-term continuous operation of industrial air conditioners.

[0004] Patent CN204495157U discloses an external sealing pipe structure for water-cooled radiators. This patent features a threaded locking pipe joint consisting of a pipe head, a locking nut, and two sets of independent sealing rings. The locking nut axially compresses the sealing rings to achieve internal and external sealing of the pipe joint, which is the most common basic sealing structure used in industrial water cooling. However, this design has several drawbacks: First, the sealing rings are only subjected to axial compression in one direction, lacking bidirectional compression and slotted insertion limiting structures. Under high pressure, the sealing rings are easily squeezed out of the sealing groove by the coolant pressure, causing leakage at the interface. Second, the joint lacks an adaptive compensation component with ball-and-spiral groove linkage. After the sealing rings wear, there is no mechanical structure to continuously replenish pressure, leading to irreversible degradation of sealing performance. Third, it cannot achieve sealing aids through sealing ring torsion. Facing the frequent temperature fluctuations and thermal expansion and contraction caused by industrial air conditioning, the sealing surface fit continuously deteriorates, resulting in insufficient vibration resistance and high-pressure resistance. Fourth, the sealing ring insertion lacks a conical convex-concave fit positioning, leading to a high probability of sealing ring misalignment during assembly, poor assembly consistency, and a low yield rate in mass production.

[0005] In addition, most conventional liquid-cooled sealing joints on the market adopt an integrated sealing groove structure, with the sealing ring embedded in the joint base and unable to be disassembled and replaced separately. Once the sealing ring corrodes or wears, the entire joint must be scrapped. While some conical sealing joints have a single set of conical sealing mating surfaces, they lack a sealing plate, limiting sleeve, and shaft linkage compensation structure, failing to dynamically replenish the clamping force during sealing ring wear and thus unable to extend the service life of the seal. In summary, existing liquid-cooled sealing joints still have significant technical shortcomings in terms of adaptive sealing compensation, automatic wear allowance compensation, shock resistance and anti-loosening, individual sealing ring replacement, and high-pressure leakage prevention. There is an urgent need to develop a sealing connection component for industrial air conditioning liquid-cooled systems that can perform bidirectional compression sealing, automatic wear compensation, shock resistance and anti-loosening, and allows for individual sealing ring replacement. Summary of the Invention

[0006] The purpose of this invention is to provide a sealed connection assembly for an industrial air conditioning liquid cooling system to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a sealing connection assembly for an industrial air conditioning liquid cooling system, including a male head and a female head. A connecting pipe is integrally formed on the upper part of the male head, and a sleeve is integrally formed on the lower part of the female head. The connecting pipe and the sleeve are threadedly connected. The male head and the female head are interconnected through the threaded sleeve and the connecting pipe. The left end of the male head and the right end of the female head are respectively connected to the pipeline of the industrial air conditioning liquid cooling system. A sealing ring 1 is embedded in the upper surface of the connecting pipe. Half of the inner wall of the sleeve is threaded, and the other half is smooth. A sealing plate is slidably connected to the smooth surface. A sealing ring 2 is embedded in the bottom of the sealing plate. A boss is provided at the bottom of the sealing ring 2, and the boss is conical. A groove is provided on the upper surface of the sealing ring 1, and the groove is conical. The boss of the sealing ring 2 and the groove of the sealing ring 1 are perpendicularly aligned with each other.

[0008] The present invention further illustrates that a shaft is rotatably connected at the connection between the sleeve and the female head, and a limiting sleeve is sleeved on the outer side of the shaft. The lower surface of the limiting sleeve is in contact with the upper surface of the sealing plate. An insertion hole is provided on the upper surface of the sealing plate, and the lower end of the shaft is inserted into the insertion hole.

[0009] The present invention further illustrates that the outer surface of the shaft is rolled with balls, and the inner wall of the limiting sleeve is provided with a spiral groove, in which the balls are rolled in the spiral groove.

[0010] The present invention further illustrates that a guide rail is integrally formed at the connection between the sleeve and the female head, and a sliding groove is provided on the outer wall of the limiting sleeve, which is slidably connected to the guide rail through the sliding groove.

[0011] The present invention further illustrates that both the second sealing ring and the first sealing ring are elastic.

[0012] The present invention further illustrates that slots are formed between the inner side of the boss of the second sealing ring and the outer side of the bottom of the sealing plate, and between the outer side of the boss of the second sealing ring and the inner wall of the sleeve; the left and right sides of the groove of the first sealing ring are respectively embedded in the two slots.

[0013] The present invention further illustrates that the upper surface of the sealing ring two is provided with a circular groove, and the inner wall of the circular groove is provided with a retaining groove on both the left and right sides. The lower end of the shaft is integrally formed with retaining blocks on both the left and right sides, and the retaining blocks are engaged in the retaining grooves.

[0014] The present invention further illustrates that the inner diameter of the insertion hole is greater than the maximum outer diameter of the card block.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are: The composite multi-layer sealing structure provides excellent high-pressure leak-proof performance. This invention employs a tapered boss and tapered groove for precise alignment and compression, combined with slot-embedded filling and sealing. The bidirectional compression structure of the sealing plate and limiting sleeve eliminates sealing gaps. Compared to traditional single-plane seals and multi-layer ring stacked seal structures, this significantly improves the sealing fit and can stably adapt to the high-pressure, high-flow-rate conditions of industrial air conditioning liquid cooling systems, completely eliminating pipeline interface leakage problems.

[0016] It features adaptive wear compensation, effectively extending service life. This invention utilizes the rolling contact between balls and spiral grooves to continuously generate axial prestress. After long-term use, when the sealing ring experiences wear or slight corrosion, it automatically presses down on the sealing plate and sealing ring, dynamically compensating for the sealing compression and continuously maintaining a sealed fit. This solves the problem of irreversible degradation of sealing performance in existing technologies and maximizes the service life of the components.

[0017] Featuring a self-contained torsion locking structure, this invention offers excellent shock resistance and anti-loosening stability. The shaft locking block engages with the sealing ring groove, causing moderate torsional deformation of the two sets of sealing rings during assembly, further enhancing the sealing effect. Simultaneously, it increases the locking strength of the male and female threaded connections, effectively mitigating the risk of loosening caused by equipment vibration and thermal deformation, ensuring the reliable sealing of the liquid cooling system during long-term continuous operation.

[0018] The split-type sealing design results in lower operation and maintenance costs. The sealing ring 1 and sealing ring 2 of this invention are independent, detachable, and replaceable components. If the seal fails, there is no need to replace the entire connecting assembly; maintenance can be completed by replacing only the seal. The overall structure is simple, easy to process and mold, and has low manufacturing difficulty, significantly reducing equipment production and subsequent maintenance costs, making it suitable for industrial-scale mass applications. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the sleeve of the present invention; Figure 3 This is an exploded view of the internal structure of the sleeve of the present invention; Figure 4 This is a cross-sectional view of the internal structure of the sleeve of the present invention; Figure 5 This is a plan view of the internal structure of the sleeve of the present invention; Figure 6 This is a schematic diagram of the internal structure of the limiting sleeve of the present invention; Figure 7 This is a schematic diagram of the shaft structure of the present invention; In the diagram: 1. Male connector; 11. Connecting pipe; 12. Sealing ring one; 2. Female connector; 21. Sleeve; 22. Sealing plate; 23. Sealing ring two; 231. Circular groove; 232. Slot; 24. Shaft; 241. Ball bearing; 242. Locking block; 25. Limiting sleeve; 251. Spiral groove; 26. Guide rail; 27. Slot; 28. Insertion hole. Detailed Implementation

[0020] The following detailed, non-limiting description of the technical solution of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-7 The present invention provides a technical solution: a sealing connection component for an industrial air conditioning liquid cooling system, including a male head 1 and a female head 2. A connecting pipe 11 is integrally formed on the upper part of the male head 1, and a sleeve 21 is integrally formed on the lower part of the female head 2. The connecting pipe 11 and the sleeve 21 are threadedly connected. The male connector 1 and the female connector 2 are connected to each other by a threaded sleeve 21 and a connecting pipe 11. The left end of the male connector 1 and the right end of the female connector 2 are respectively connected to the pipeline of the industrial air conditioning liquid cooling system. A sealing ring 12 is embedded in the upper surface of the connecting pipe 11. Half of the inner wall of the sleeve 21 is threaded and the other half is smooth. A sealing plate 22 is slidably connected to the smooth surface. A sealing ring 23 is embedded in the bottom of the sealing plate 22. A boss is provided at the bottom of the sealing ring 23. The boss is conical. A groove is provided on the upper surface of the sealing ring 12. The boss of sealing ring 23 and the groove of sealing ring 12 are perpendicularly aligned with each other. Insert sealing ring 23 into sleeve 21, then embed sealing ring 12 into the upper end of connecting pipe 11. Next, screw connecting pipe 11 into sleeve 21 via threaded connection to connect male connector 1 and female connector 2, thus transferring liquid to the industrial air conditioning liquid cooling system. When connecting pipe 11 is screwed into sleeve 21, sealing ring 12 contacts sealing ring 23, and the protrusion of sealing ring 23 is embedded in the groove of sealing ring 12. Continue screwing connecting pipe 11 until sealing plate 22 slides along the inner wall of sleeve 21 to a limit position, thus stopping its movement. Continue screwing connecting pipe 11, causing sealing ring 23 and sealing ring 12 to press against each other, the protrusion embedding into the groove, and squeezing sealing ring 12 inwards and outwards. This ensures that sealing ring 12 and sealing ring 23 are tightly fitted with sealing plate 22 and the inner wall of sleeve 21, resulting in excellent sealing and effectively preventing liquid leakage.

[0022] A shaft 24 is rotatably connected at the connection between the sleeve 21 and the female head 2, and a limiting sleeve 25 is sleeved on the outside of the shaft 24. The lower surface of the limiting sleeve 25 is in contact with the upper surface of the sealing plate 22. An insertion hole 28 is provided on the upper surface of the sealing plate 22, and the lower end of the shaft 24 is inserted into the insertion hole 28. When the sealing plate 22 is pushed to slide along the inner wall of the sleeve 21, the sealing plate 22 moves relative to the shaft 24 through the insertion hole 28 and pushes the limiting sleeve 25 to move upward. The lower end of the shaft 24 squeezes the sealing ring 23, thereby strengthening the adhesion between the sealing ring 23 and the sealing ring 12. By squeezing the sealing ring 12 and the sealing ring 23 in both directions, the sealing effect is further improved.

[0023] The outer surface of the shaft 24 is rolled with balls 241, and the inner wall of the limiting sleeve 25 is provided with a spiral groove 251, in which the balls 241 are rolled in.

[0024] The connection between the sleeve 21 and the female head 2 is integrally formed with a guide rail 26, and the outer wall of the limiting sleeve 25 is provided with a sliding groove, which is slidably connected to the guide rail 26 through the sliding groove. When the shaft 24 presses against the second sealing ring 23, the sealing plate 22 moves upward and pushes against the limiting sleeve 25 to move upward. The ball 241 rolls in the spiral groove 251 and generates axial force, which causes the shaft 24 to rotate and generate stress. At the same time, the limiting sleeve 25 slides upward through the guide rail 26. The stress is applied to the sealing plate 22 through the limiting sleeve 25 and then transferred to the second sealing ring 23. When connecting the male head 1 and the female head 2, the sealing strength is maximized. The reaction force applied by the ball 241 to the spiral groove 251 strengthens the tightness between the first sealing ring 12 and the second sealing ring 23, thus sealing them firmly and preventing leakage when the liquid cooling system is working.

[0025] Both sealing ring 23 and sealing ring 12 are elastic; The elastic deformation of sealing ring 23 and sealing ring 12 results in extremely high sealing performance when they are squeezed together. However, wear occurs after long-term operation. At this time, male head 1 and female head 2 are disassembled to remove sealing ring 23 for replacement. Only sealing ring 23 and sealing ring 12 need to be replaced, without replacing the entire sealing connection assembly, thus reducing cost and losses. Moreover, the whole structure is simple, easy to manufacture, and the manufacturing cost is greatly reduced. Compared with conventional sealing connection assemblies on the market, it can be adapted to industrial air conditioning liquid cooling systems to the greatest extent and has better performance. The axial force between the ball bearing 241 and the spiral groove 251 is relatively large. After long-term use, the sealing ring 12 and the sealing ring 23 will wear or be corroded. The downward force applied by the axial force between the ball bearing 241 and the spiral groove 251 causes the limiting sleeve 25 to move downward slightly, pushing the sealing plate 22 downward slightly and resetting it downward slightly, thereby pressing the sealing plate 22 down and squeezing the sealing ring 12 and the sealing ring 23. Whenever the sealing ring 12 and the sealing ring 23 experience a certain amount of wear, the force between the ball bearing 241 and the spiral groove 251 causes the limiting sleeve 25 to move downward automatically to compensate for the wear of the sealing ring 12 and the sealing ring 23, so as to maintain the sealing between the sealing ring 23 and the sealing ring 12 at all times, until it is completely scrapped before it needs to be replaced. This maximizes the service life of the structure and greatly reduces the maintenance and replacement cost of the sealing connection assembly.

[0026] Slots 27 are formed between the inner side of the boss of sealing ring 23 and the outer side of the bottom of sealing plate 22, and between the outer side of the boss of sealing ring 23 and the inner wall of sleeve 21. The left and right sides of the groove of the sealing ring 12 are respectively embedded in the two slots 27; When the boss of sealing ring 23 is inserted into the groove of sealing ring 12, the inside and outside of the groove of sealing ring 12 are fully embedded in the slot 27, achieving a preliminary seal between sealing ring 12 and sealing ring 23. Then, the conical boss squeezes the conical groove, squeezing the inner and outer sides of sealing ring 12 outward and inward respectively, so that sealing ring 12 squeezes the slot 27, fully filling the slot 27, thereby eliminating all gaps, greatly improving the sealing quality, and achieving extremely high sealing performance. It can be used in situations where the pressure is too high in liquid cooling systems, and completely eliminates leakage.

[0027] The upper surface of the sealing ring 23 is provided with a circular groove 231, and the inner wall of the circular groove 231 is provided with a retaining groove 232 on both the left and right sides. The lower end of the shaft 24 is integrally formed with retaining blocks 242 on both the left and right sides, and is engaged in the retaining groove 232 by the retaining blocks 242.

[0028] The inner diameter of the socket 28 is larger than the maximum outer diameter of the locking block 242; When the lower end of the shaft 24 compresses the second sealing ring 23, the second sealing ring 23 slides downward slightly. At the same time, the axial force generated between the ball 241 and the spiral groove 251 causes the shaft 24 to rotate. The lower end of the shaft 24 engages with the groove 232 through the locking block 242, thereby twisting and deforming the second sealing ring 23, which in turn twists and deforms the first sealing ring 12. The sealing performance is further increased after the two are twisted and deformed, and the connection strength between the connecting pipe 11 and the sleeve 21 is improved. This prevents the male connector 1 and the female connector 2 from loosening due to vibration during the operation of the liquid cooling system, maintains good connection strength, and plays a role in shock resistance and leakage prevention.

[0029] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing connection assembly for an industrial air conditioning liquid cooling system, comprising a male connector (1) and a female connector (2), characterized in that: The male head (1) has a connecting tube (11) integrally formed on its upper part, and the female head (2) has a sleeve (21) integrally formed on its lower part. The connecting tube (11) and the sleeve (21) are threadedly connected. The male head (1) and the female head (2) are connected to each other by a threaded sleeve (21) and a connecting pipe (11). The left end of the male head (1) and the right end of the female head (2) are respectively connected to the pipeline of the industrial air conditioning liquid cooling system. A sealing ring (12) is embedded in the upper surface of the connecting pipe (11). Half of the inner wall of the sleeve (21) is threaded and the other half is smooth. A sealing plate (22) is slidably connected to the smooth surface. A sealing ring (23) is embedded in the bottom of the sealing plate (22). A boss is provided at the bottom of the sealing ring (23), and the boss is conical. A groove is provided on the upper surface of the sealing ring (12), and the groove is conical. The boss of the second sealing ring (23) and the groove of the first sealing ring (12) are perpendicularly aligned with each other. A shaft (24) is rotatably connected to the connection between the sleeve (21) and the female head (2). A limiting sleeve (25) is sleeved on the outside of the shaft (24). The lower surface of the limiting sleeve (25) is in contact with the upper surface of the sealing plate (22). An insertion hole (28) is provided on the upper surface of the sealing plate (22). The lower end of the shaft (24) is inserted into the insertion hole (28). A ball bearing (241) is rolled on the outer surface of the shaft (24). A screw thread is provided on the inner wall of the limiting sleeve (25). The spiral groove (251) is connected to the ball (241) in a spiral groove (251). The connection between the sleeve (21) and the female head (2) is integrally formed with a guide rail (26). The outer wall of the limiting sleeve (25) is provided with a sliding groove and is slidably connected to the guide rail (26) through the sliding groove. The upper surface of the sealing ring (23) is provided with a circular groove (231). The inner wall of the circular groove (231) is provided with a slot (232) on both the left and right sides. The lower end of the shaft (24) is integrally formed with a locking block (242) on both the left and right sides and is locked in the slot (232) through the locking block (242).

2. The sealing connection assembly of an industrial air conditioning liquid cooling system according to claim 1, characterized in that: Both the second sealing ring (23) and the first sealing ring (12) are elastic.

3. The sealing connection assembly of an industrial air conditioning liquid cooling system according to claim 2, characterized in that: Slots (27) are formed between the inner side of the boss of the second sealing ring (23) and the outer side of the bottom of the sealing plate (22), and between the outer side of the boss of the second sealing ring (23) and the inner wall of the sleeve (21). The grooves of the sealing ring (12) are respectively embedded in the two slots (27) on the left and right sides.

4. The sealing connection assembly of an industrial air conditioning liquid cooling system according to claim 3, characterized in that: The inner diameter of the socket (28) is greater than the maximum outer diameter of the card block (242).

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